XML 100 R83.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Property Plant and Equipment (Narrative) (Detail) $ in Millions | 1 Months Ended | 3 Months Ended | 9 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 30, 2018 USD ($) | Aug. 31, 2018 project | Jun. 30, 2018 USD ($) a field | Mar. 31, 2018 USD ($) a field | Feb. 28, 2018 USD ($) | Jan. 31, 2018 a | Dec. 31, 2017 USD ($) | Sep. 30, 2017 project | Aug. 31, 2017 USD ($) a | Jul. 31, 2017 USD ($) a | Mar. 31, 2019 USD ($) MW | Dec. 31, 2018 USD ($) | Sep. 30, 2018 USD ($) | Dec. 31, 2017 USD ($) | Sep. 30, 2017 USD ($) | Sep. 30, 2018 USD ($) | Sep. 30, 2017 USD ($) | Dec. 31, 2020 USD ($) MW | Dec. 31, 2019 USD ($) MW | Dec. 31, 2013 USD ($) a | Oct. 31, 2018 USD ($) | Oct. 31, 2017 USD ($) | Mar. 31, 2017 USD ($) | Nov. 30, 2014 a field
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cost of project |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 108 | $ 343 |  |  |  |  |  |  |
Virginia Electric and Power Company |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cost of project |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 98 | 16 |  |  |  |  |  |  |
Virginia Electric and Power Company | Two Solar Development Projects |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of projects | project |  | 2 |  |  |  |  |  | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dominion Energy Gas Holdings, LLC | Utica and Point Pleasant Shale | Oil and Gas Properties |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount of consideration |  |  |  | $ 16 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Development rights (number of acres) | a |  |  |  | 11,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of natural gas storage fields | field |  |  |  | 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from assignment of Shale Development Rights |  |  |  | $ 16 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dominion Energy Gas Holdings, LLC | Utica and Point Pleasant Shale | Oil and Gas Properties | Other operations and maintenance |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain on sale |  |  |  | 16 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
After tax gain on sale |  |  |  | $ 12 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dominion Energy Gas Holdings, LLC | Marcellus Shale | Oil and Gas Properties |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount of consideration |  |  | $ 6 |  | $ 28 |  |  |  |  | $ 5 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Development rights (number of acres) | a |  |  | 9,000 |  |  | 18,000 |  |  |  | 2,000 |  |  |  |  |  |  |  |  |  | 100,000 |  |  |  | 24,000
Period for payments related to conveyance of natural gas storage fields |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 9 years |  |  |  |
Gas and oil area developed net remaining interest conveyed percentage |  |  |  |  |  | 50.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of natural gas storage fields | field |  |  | 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1
Dominion Energy Gas Holdings, LLC | Marcellus Shale | Oil and Gas Properties | Amended Agreement To Extend Conveyance Of Development Rights |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain on sale |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 9 | $ 56 |  |  |  |  |  |  |  |  |
After tax gain on sale |  |  |  |  |  |  |  |  |  |  |  |  |  | 5 | 33 |  |  |  |  |  |  |  |  |
Development rights (number of acres) | a |  |  |  |  |  |  |  |  | 70,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gas and oil area developed net remaining interest conveyed percentage |  |  |  |  |  |  |  |  | 68.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total consideration | $ 65 |  |  |  |  |  |  |  | $ 130 |  |  |  |  | 65 |  |  |  |  |  |  |  |  |  |
Dominion Energy Gas Holdings, LLC | Marcellus Shale | Oil and Gas Properties | Amended Agreement To Extend Conveyance Of Development Rights | Final Conveyance |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain on sale | 65 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
After tax gain on sale | 47 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dominion Energy Gas Holdings, LLC | Marcellus Shale | Oil and Gas Properties | Other operations and maintenance |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain on sale |  |  | $ 6 |  | 28 |  |  |  |  | $ 5 |  |  |  |  |  |  |  |  |  |  |  |  |  |
After tax gain on sale |  |  | $ 4 |  | $ 20 |  |  |  |  | $ 3 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum | Dominion Energy Gas Holdings, LLC | Marcellus Shale | Oil and Gas Properties |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount of consideration |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 200 |  |  |  |
Scenario, Forecast | Virginia Electric and Power Company |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cost of project |  |  |  |  |  |  |  |  |  |  | $ 37 |  |  |  |  |  |  |  |  |  |  |  |  |
MW capacity | MW |  |  |  |  |  |  |  |  |  |  | 20 |  |  |  |  |  |  |  |  |  |  |  |  |
Scenario, Forecast | Virginia Electric and Power Company | Two Solar Development Projects |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
MW capacity | MW |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 155 | 155 |  |  |  |  |
Scenario, Forecast | Virginia Electric and Power Company | First Solar Development Project |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cost of project |  |  |  |  |  |  |  |  |  |  |  | $ 140 |  |  |  |  |  |  | $ 120 |  |  |  |  |
Scenario, Forecast | Virginia Electric and Power Company | Second Solar Development Project |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cost of project |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 130 | $ 140 |  |  |  |  |
Retail Energy Marketing Assets | Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount of consideration |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 143 |  |
Contractual term of agreement to use brand |  |  |  |  |  |  | 10 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Retail Energy Marketing Assets | Disposal Group, Disposed of by Sale, Not Discontinued Operations | First Phase of Agreements to Sell Certain Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount of consideration |  |  |  |  |  |  | $ 79 |  |  |  |  |  |  | $ 79 |  |  |  |  |  |  |  |  |  |
Retail Energy Marketing Assets | Disposal Group, Disposed of by Sale, Not Discontinued Operations | Scenario, Forecast |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain on sale |  |  |  |  |  |  |  |  |  |  |  | 65 |  |  |  |  |  |  |  |  |  |  |  |
After tax gain on sale |  |  |  |  |  |  |  |  |  |  |  | 49 |  |  |  |  |  |  |  |  |  |  |  |
Fairless and Manchester |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount of consideration | 1,200 |  |  |  |  |  |  |  |  |  |  |  | $ 1,200 |  |  | 1,200 |  |  |  |  |  |  |  |
Fairless and Manchester | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sale of equity method investments, estimated decrease in tax expenses upon usage of tax incentives |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 50 |  |  |  |  |  |  |  |
Fairless and Manchester | Scenario, Forecast |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain on sale of equity method investment |  |  |  |  |  |  |  |  |  |  |  | 210 |  |  |  |  |  |  |  |  |  |  |  |
Gain on sale of equity method investments, net of tax |  |  |  |  |  |  |  |  |  |  |  | $ 150 |  |  |  |  |  |  |  |  |  |  |  |
Assignment of Tower Rental Portfolio | Disposal Group, Disposed of by Sale, Not Discontinued Operations | Virginia Electric and Power Company |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount of consideration |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 91 |
Amount recognized in operating revenue and other income from sale |  |  |  |  |  |  |  |  |  |  |  |  | 2 |  | $ 2 | 5 | $ 10 |  |  |  |  |  |  |
Amount to be recognized in other income ratably through 2023 | $ 30 |  |  |  |  |  |  |  |  |  |  |  | $ 30 |  |  | $ 30 |  |  |  |  |  |  |  |
Subsequent Event | Retail Energy Marketing Assets | Disposal Group, Disposed of by Sale, Not Discontinued Operations | Second Phase of Agreements to Sell Certain Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount of consideration |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 63 |  |  |

X
- Definition Capacity of facility of company owned solar distribution generation facilities. + References No definition available. + Details
Name: | d_CapacityOfFacilityOfCompanyOwnedSolarDistributionGenerationFacilities
Namespace Prefix: | d_
Data Type: | num:powerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Contractual term of agreement to use brand. + References No definition available. + Details
Name: | d_ContractualTermOfAgreementToUseBrand
Namespace Prefix: | d_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Equity Method Investment, Realized Gain (Loss) on Disposal, Net of Tax + References No definition available. + Details
Name: | d_EquityMethodInvestmentRealizedGainLossOnDisposalNetOfTax
Namespace Prefix: | d_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Gain (loss) on disposition of property plant and equipment, net of tax. + References No definition available. + Details
Name: | d_GainLossOnDispositionOfPropertyPlantAndEquipmentNetOfTax
Namespace Prefix: | d_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Gas and oil area, developed, net, remaining interest conveyed, percentage. + References No definition available. + Details
Name: | d_GasAndOilAreaDevelopedNetRemainingInterestConveyedPercentage
Namespace Prefix: | d_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of solar development projects acquired. + References No definition available. + Details
Name: | d_NumberOfSolarDevelopmentProjectsAcquired
Namespace Prefix: | d_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Oil and gas property, number of natural gas storage fields. + References No definition available. + Details
Name: | d_OilAndGasPropertyNumberOfNaturalGasStorageFields
Namespace Prefix: | d_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Sale of equity method investments, estimated decrease in tax expenses upon usage of tax credits and other tax incentives. + References No definition available. + Details
Name: | d_SaleOfEquityMethodInvestmentsEstimatedDecreaseInTaxExpensesUponUsageOfTaxCreditsAndOtherTaxIncentives
Namespace Prefix: | d_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Significant acquisitions and disposals period for payments related to conveyance of natural gas storage fields. + References No definition available. + Details
Name: | d_SignificantAcquisitionsAndDisposalsPeriodForPaymentsRelatedToConveyanceOfNaturalGasStorageFields
Namespace Prefix: | d_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=109124213&loc=d3e6613-128477 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=109124213&loc=d3e6578-128477 + Details
Name: | us-gaap_BusinessCombinationConsiderationTransferred1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The excess amount received or due over net assets in a transaction accounted for as a divestiture where a subsidiary, business or operating assets are "sold" by the entity to a newly formed, thinly capitalized, highly leveraged buyer. This gain is not yet recognized and is disclosed on the balance sheet as an offset against the carrying amount of the securities received. + References No definition available. + Details
Name: | us-gaap_DisposalGroupDeferredGainOnDisposal
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation. + References No definition available. + Details
Name: | us-gaap_DisposalGroupIncludingDiscontinuedOperationConsideration
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount before tax of gain (loss) recognized on the sale or disposal of a disposal group. Excludes discontinued operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=109226348&loc=d3e2443-110228 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=109226691&loc=d3e2941-110230 + Details
Name: | us-gaap_DisposalGroupNotDiscontinuedOperationGainLossOnDisposal
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of gain (loss) on sale or disposal of an equity method investment. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(b)(7)(c)) -URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(b)(9)(a)) -URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227 + Details
Name: | us-gaap_EquityMethodInvestmentRealizedGainLossOnDisposal
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585 + Details
Name: | us-gaap_GainLossOnSaleOfPropertyPlantEquipment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Fractional interest owned based on working interests or other economic arrangements of area spaced or assigned to productive wells. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1208 -Paragraph (a) + Details
Name: | us-gaap_GasAndOilAreaDevelopedNet
Namespace Prefix: | us-gaap_
Data Type: | num:areaItemType
Balance Type: | na
Period Type: | instant

X
- Definition The cash outflow from the amount invested for projects in hopes of getting a future return or interest from it. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3213-108585 + Details
Name: | us-gaap_PaymentsToAcquireProjects
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3179-108585 + Details
Name: | us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | dei_LegalEntityAxis=d_VirginiaElectricAndPowerCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=d_TwoSolarDevelopmentProjectsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=d_DominionEnergyGasHoldingsLLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=d_UticaAndPointPleasantShaleMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_OilAndGasPropertiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=d_OtherOperationsAndMaintenanceExpenseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=d_MarcellusShaleMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis=d_AmendedAgreementToExtendConveyanceOfDevelopmentRightsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TransactionTypeAxis=d_FinalConveyanceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementScenarioAxis=us-gaap_ScenarioForecastMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=d_FirstSolarDevelopmentProjectMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=d_SecondSolarDevelopmentProjectMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=d_RetailEnergyMarketingOperationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DisposalGroupClassificationAxis=us-gaap_DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementScenarioAxis=d_FirstPhaseOfAgreementsToSellCertainAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=d_FairlessAndManchesterMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=d_RentalPortfolioOfElectricTransmissionTowersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementScenarioAxis=d_SecondPhaseOfAgreementsToSellCertainAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |